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Concrete Beam Analysis

This document discusses the key considerations for using externally bonded fiber-reinforced polymer (FRP) systems to strengthen concrete structures. It outlines that drawings and specifications should include details of the FRP system, installation procedures, material properties, surface preparation requirements, and quality control procedures. Submittals from the FRP manufacturer, installation contractor, or inspection agency may be required to validate qualifications, experience, and product information.

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Romani Noel S. Chavez Jr.
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165 views4 pages

Concrete Beam Analysis

This document discusses the key considerations for using externally bonded fiber-reinforced polymer (FRP) systems to strengthen concrete structures. It outlines that drawings and specifications should include details of the FRP system, installation procedures, material properties, surface preparation requirements, and quality control procedures. Submittals from the FRP manufacturer, installation contractor, or inspection agency may be required to validate qualifications, experience, and product information.

Uploaded by

Romani Noel S. Chavez Jr.
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLSX, PDF, TXT or read online on Scribd
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Reinforced Concrete Design

FLEXURAL ANALYSIS OF CONCRETE BEAM

Section
bw = 200 mm
h = 400 mm
top bar, n = 0
top bar, dia. = 0 mm
bot bar, n = 2
bot bar, dia. = 20 mm
cover, d' = 40 mm
d = 350

Material
f'c = 21 MPa
β_1 = 0.85
fy = 415 MPa
E = 200,000 MPa

Steel
As = 628 mm2
As1 = 628 mm2
 
As2=As' = 0 mm2  bal  0.85 fc '  600 
ρ_bal = 0.0216 ffy  600  y 

ρ_max = 0.0162 analyze as… singly reinforced


ρ_min = 0.0110
ρ = 0.0090 steel yield

Strain
ε_y = 0.0021 0.003   y
 b
ε_s = 0.0092 0.003   t

Reduction Factor
ϕ = 0.9000 tension controlled

Case I singly reinforced. ρ<ρmax


Case II doubly reinforced. ρ>ρbal, As do not yield
Case III doubly reinforced. ρmax<ρ<ρbal, As yield

Case = I
a = 73.04 mm
c = 85.93 mm

fs = 415.00 MPa
fs' = - MPa

Cc = 260.75 kN
Cs = - kN
T = 260.75 kN

Moment Capacity Case I


Mu = 73.57 kN-m   a 
Mu   C c  d   
  2 

Case II & III


  a 
Mu   C c  d    C s  d  d '  
  2 
Reinforced Concrete Design
Externally Bonded FRP Systems for Strengthening Concrete Structures

Drawing and Specifications


FRP System to be used
Location of FRP system relative to existing structure
Dimensions, no. of ply, sequence of installation
ply
laminate
near-surface-mounted (NSM) bar
Location of splices and lap length
General notes specifiying
design loads
allowable strains
Material properties
FRP laminates
concrete substrate
Concrete surface preparation
corner preparation
groove dimensions for NSM bars
maximum irregularity limitations
Installation procedures
surface temperature
moisture limitations
application time limits between successive plies
Curing procedures of FRP systems
Protective coatings and sealants, if required
Shipping, storage and handling
Quality control and inspection procedures
In-place load testing installed in FRP system, if necessary

Submitalls
Specifications shall require the FRP system manufacturer
installation contractor
or inspection agency
of the following:
product information
qualifications and experience

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